Strategy:
Nausica is arguably the best Musketeer companion out there, and, possibly, the best companion in PvP currently in the game. At first, her epics may seem a bit underwhelming, but, aside from Quick Adjust, she can learn five more! Her epic pool consists of Burst Fire and True Grit, so definitely invest in a couple tiers of those epics. Train Burst Fire up to tier 2 (as tier 3 is untrainable on her) and True Grit up to tier 3. Double Tap could be swapped out with the last tier of True Grit, but, considering the fact that it won't activate too often, True Grit 3 seems to be the better choice.

So, what sets her aside from companions such as Bonnie Anne and Zeena? Her powers. Her Centaur's Charge allows her to move basically anywhere on the battleboard, twice as far as she could normally move. Additionally, enemy epics can go off because of her movement; while this may seem like a bad thing, it's actually extremely helpful! Due to most builds of Bonnie Anne and Zeena consisting of Overwatch, Nausica's True Grit will activate in response. This can lead to several tiers of Burst Fire, and possibly more tiers of True Grit if you're up against Bonnie Anne or a Musketeer pirate with Quick Draw trained. Then, her normal attack from Centaur's Charge will go off, which can cause Burst Fire to activate if it didn't three times already from True Grit. This will likely be enough to drop Bonnie Anne, Zeena, or a Musketeer pirate in one turn, or at least bring them down to low health. Then, you still have her Point Blank Shot powers...

Nausica is certainly a force to be reckoned with in PvP. Even in PvE, she can charge into the fight with your Swashbucklers and Buccaneers immediately, and her high health will be enough to keep her around long enough to break through enemy lines. The Cutthroat Bundle is a great investment if you are looking for an extremely versatile Musketeer companion. Be sure to check out the pages for the other bundle companions to see which one is right for you!